For Exercises 49–56, do the following:

  1. State the hypotheses.
  2. Find and the critical region.
  3. Find . Also, draw a standard normal curve showing , the critical region, and .
  4. State the conclusion and the interpretation.

Question 9.87

52. Video Gamers. Can't pry the PlayStation away from your dad? In 2015, the Entertainment Software Association reported that the mean age of video gamers was 35 years old. A recent random sample of 36 video gamers had a mean age of 34. Assume . Test, using level of significance , whether the population mean age of video gamers is less than 35.